Brown was a factory color for 84. 83 came with V-6 gas or inline diesel only in US. In 84 they added the 4 cyl gas turbo. All 760's got factory auto climate control, cruise, nicer interior, etc. The climate control systems can be finnicky and pricey to fix. The V-6 and diesels are crap. They also came with nivomat rear shocks. Current dealer price for these shocks is about $500 EACH. The good news is you can use standard shocks from a 740 IF you replace the rear springs.